DL 706 then DL 2381 at Atlanta
Denver → Atlanta → Houston Hobby
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
15:15DL 2381 to Houston Hobby leaves the gate
21 h 14 apart on the timetable, overnight
DL 2381 leaves 21 h 14 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.